Virtual Booth

Can coastal mud power the purification of our wastewater? Remote fishing communities heavily pollute marine habitats with domestic greywater because they lack the grid electricity needed for conventional treatment facilities.

        This project introduces a self-sustaining solution: a decentralized, multi-stage filtration unit powered entirely by a Mangrove Microbial Fuel Cell (MFC). The system works through two synchronized mechanisms. First, native bacteria in oxygen-deficient mud decompose organic matter on carbon electrodes. This process generates a natural bio-electrical output (0.4V–0.6V) that powers environmental monitoring indicators without any external grid. Concurrently, contaminated greywater is gravity-fed through a low-cost filter column packed with local waste materials: coarse sand, crushed biochar, and upcycled eggshells. The biochar adsorbs chemical dyes, while the eggshell calcium carbonate buffers alkaline soapy water back to safe, neutral levels. 

        Experimental data verified a highly successful purification rate, achieving a neutral pH shift (6.5–7.5), a dramatic reduction in turbidity, and increased dissolved oxygen. By turning destructive greywater into clean water using natural ecosystem voltage, this zero-emission blueprint offers an affordable, revolutionary approach to off-grid conservation.